Protein Modification Reagents
Cayman Chemical mal-PEG2-AZD 5mg
A bioconjugation linker; has been used in the development of protein- and peptidomimetic-antibody conjugates
Medchemexpress LLC HY-103602A 100mg Medchemexpress, (S,R,S)-AHPC-PEG3-NH2 CAS:2010159-56-3 Purity:>98%
Medchemexpress, HY-103602A 100mg (S,R,S)-AHPC-PEG3-NH2 CAS:2010159-56-3 (S,R,S)-AHPC-PEG3-NH2 is a synthesized E3 ligase ligand-linker conjugate that incorporates the (S,R,S)-AHPC based VHL ligand and 3-unit PEG linker used in PROTAC technology. Purity:>98% Medchemexpress has over 10000 novel life-science reagents, reference compounds, APIs and natural compounds for laboratory and scientific use. Other quantity can also be offered.
![eMolecules 957486-82-7 | N3-PEG6-CH2CH2NH2 | Acrotein ChemBio Inc. | MFCD03453240 | 350.416 | C14H30N4O6 | 97.000 | NCCOCCOCCOCCOCCOCCOCCN=[N+]=[N-] | 0.5g | 487536598](https://assets.fishersci.com/TFS-Assets/CCG/product-images/5000473261.jpg-250.jpg)
eMolecules 957486-82-7 | N3-PEG6-CH2CH2NH2 | Acrotein ChemBio Inc. | MFCD03453240 | 350.416 | C14H30N4O6 | 97.000 | NCCOCCOCCOCCOCCOCCOCCN=[N+]=[N-] | 0.5g | 487536598
N3-PEG6-CH2CH2NH2 | Acrotein ChemBio Inc. | 957486-82-7 | MFCD03453240 | 350.416 | C14H30N4O6 | 97.000 | NCCOCCOCCOCCOCCOCCOCCN=[N+]=[N-] | 0.5g | 487536598
Medchemexpress LLC Endo-BCN-PEG4-PFP ester | 2904607-26-5 | 95.0% | C28H34F5NO8 | 10MG
endo-BCN-PEG4-PFP ester is a PEG-based bifunctional linker combining a strained alkyne (BCN) for strain-promoted alkyne-azide cycloaddition with a pentafluorophenyl (PFP) activated ester for efficient conjugation to primary amines. Supplied as an oil, it is designed for use in click chemistry, bioconjugation, and linker assembly in targeted degrader synthesis.
- Enables strain-promoted alkyne-azide cycloaddition (SPAAC) without copper.
- PFP ester reacts efficiently with primary amines to form stable amide bonds.
- PEG4 spacer improves solubility and reduces steric hindrance.
- Suitable for bioconjugation and targeted degrader linker construction workflows.
- Stable when stored frozen; follow recommended storage conditions for longevity.
Broadpharm ENDO-BCN-PEG12-NHS ESTER 98% CAS#2183440-26-6
ENDO-BCN-PEG12-NHS ESTER 98% CAS#2183440-26-6
Medchemexpress LLC Dbco-nhco-peg6-biotin | 3081794-36-4 | 96.7% | C43H59N5O10S | 10MG
DBCO-NHCO-PEG6-Biotin is a PEG-based bioconjugation linker bearing a strain-promoted dibenzocyclooctyne (DBCO) moiety and a biotin tag. It is designed for copper-free click chemistry to couple azide-containing molecules for detection, enrichment, or incorporation into bifunctional constructs such as PROTACs. Supplied as a colorless to light yellow oil with high purity and DMSO solubility.
- Enables copper-free strain-promoted alkyne-azide cycloaddition (SPAAC).
- Provides a biotin tag for affinity enrichment and detection.
- Contains a PEG6 spacer to improve solubility and reduce steric hindrance.
- High purity suitable for bioconjugation and linker synthesis.
- Soluble in DMSO for convenient formulation.
- Stable when stored under inert atmosphere at recommended temperatures.
Cayman Chemical Aceclofenac ethyl ester 100mg
A potential impurity in commercial preparations of aceclofenac
Medchemexpress LLC HyNic-PEG2-DBCO | 2741281-12-7 | >98.0% | 610.72 g/mol | C34H38N6O5 | 5 MG
HyNic-PEG2-DBCO is a bifunctional PEG2 linker combining a hydrazinonicotinamide (HyNic) reactive handle with a dibenzocyclooctyne (DBCO) moiety for orthogonal bioconjugation. Supplied as a solid (5 mg), it is intended for research use in PROTAC synthesis, protein/antibody conjugation, and copper-free click-chemistry workflows.
- Provides orthogonal conjugation: hydrazone formation and copper-free SPAAC.
- Contains HyNic and DBCO reactive groups for selective coupling.
- PEG2 spacer improves solubility and reduces steric hindrance.
- High purity (>98%) suitable for research applications.
- Supplied as a solid powder for straightforward storage and handling.
- Recommended storage refrigerated at 2-8 °C to preserve stability.
Medchemexpress LLC Mal-PEG2-NHS | 329364-72-9 | MFCD34471337 | 95.0% | C14H16N2O8 | 10MG
Mal-PEG2-NHS is a PEG-based bifunctional linker bearing a maleimide and an N-hydroxysuccinimide (NHS) ester. It enables site-selective conjugation by reacting the maleimide with thiols and the NHS ester with primary amines, facilitating assembly of bifunctional molecules such as PROTACs and other bioconjugates.
- Contains maleimide and NHS ester functional groups.
- Provides a two-unit PEG spacer for flexibility and solubility.
- Enables thiol- and amine-directed conjugation chemistries.
- Suitable for PROTAC synthesis and general bioconjugation applications.
- High purity (~95%) for reliable synthetic performance.